67640045930 has 16 divisors (see below), whose sum is σ = 121852477224. Its totient is φ = 27033708480.

The previous prime is 67640045881. The next prime is 67640045947. The reversal of 67640045930 is 3954004676.

It is a Cunningham number, because it is equal to 260077²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 24350666209 + 43289379721 = 156047^2 + 208061^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2776001 + ... + 2800260.

Almost surely, 2^67640045930 is an apocalyptic number.

67640045930 is a deficient number, since it is larger than the sum of its proper divisors (54212431294).

67640045930 is a wasteful number, since it uses less digits than its factorization.

67640045930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577481.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 67640045930 in words is "sixty-seven billion, six hundred forty million, forty-five thousand, nine hundred thirty".